import React, {Component} from "react";
import PropTypes from 'prop-types'

import CommentItem from "../comment-item/comment-item";
import './commentList.css'

export default class CommentList extends Component {

    //给组件类指定属性
    static propTypes = {
        comments: PropTypes.array.isRequired,
        deleteComment: PropTypes.func.isRequired
    }

    render() {

        const {comments, deleteComment} = this.props
        //计算出是否显示
        const display = comments.length === 0 ? 'block' : 'none'
        return (
            <div className="col-md-8">
                <h3 className="reply">评论回复：</h3>
                <h2 style={{display}}>暂无评论，点击左侧添加评论！！！</h2>
                <ul className="list-group">
                    {
                        comments.map((comment, index) => <CommentItem comment={comment} key={index}
                                                                      deleteComment={deleteComment} index={index}/>)
                    }
                </ul>
            </div>
        )
    }
}

/*
CommentList.propTypes = {
    comments: PropTypes.array.isRequired
}*/
